Cartridge holder and cartridge assembly for an injection device

Abstract

The present disclosure relates to a cartridge assembly and a cartridge holder for an injection device, wherein the cartridge holder comprises: an elongated body extending in a longitudinal direction (z), the elongated body comprises a distal end and a proximal end opposite to the distal end, wherein the elongated body confines a cartridge receiving space to accommodate a medicament container, a retainer part comprising a retainer sidewall confining a distal portion of the cartridge receiving space, the retainer part comprising a proximal end, a connector part comprising a connector sidewall and a distal connector configured to connect to the proximal end of the retainer part and comprising a proximal connector configured to connect to a distal end of a device body of the injection device, wherein the device body is configured to accommodate a drive mechanism to operably engage with the medicament container.

1 . A cartridge holder for an injection device, the cartridge holder comprising:
 an elongated body extending in a longitudinal direction (z), the elongated body comprises a distal end and a proximal end opposite to the distal end, wherein the elongated body confines a cartridge receiving space to accommodate a medicament container,   a retainer part comprising a retainer sidewall confining a distal portion of the cartridge receiving space, the retainer part comprising a proximal end,   a connector part comprising a connector sidewall and a distal connector configured to connect to the proximal end of the retainer part and comprising a proximal connector configured to connect to a distal end of a device body of the injection device, wherein the device body is configured to accommodate a drive mechanism to operably engage with the medicament container.   
     
     
         2 . The cartridge holder according to  claim 1 , wherein the connector sidewall forms a longitudinal extension of the retainer sidewall when the connector part is connected to the retainer part. 
     
     
         3 . The cartridge holder according to  claim 2 , wherein the connector sidewall and the retainer sidewall flush in the longitudinal direction (z). 
     
     
         4 . The cartridge holder according to  claim 2 , wherein an inside surface of the connector sidewall flushes with an inside surface of the retainer sidewall and/or wherein an outside surface of the connector sidewall with an outside surface of the retainer sidewall. 
     
     
         5 . The cartridge holder according to  claim 1 , wherein the connector part comprises a flange portion extending radially inwardly from the connector sidewall, the flange portion comprising a distally facing stop face configured to abut with a proximal end of the medicament container. 
     
     
         6 . The cartridge holder according to  claim 1 , wherein the proximal end of the retainer part comprises a proximal end face complementary shaped to a distal end face of the connector part and wherein the proximal end face is in longitudinal abutment with the distal end face when the connector part is connected to the retainer part. 
     
     
         7 . The cartridge holder according to  claim 1 , wherein the distal connector of the connector part and the proximal end of the retainer part are configured to form at least one of a tension stable and a pressure stable mechanical connection. 
     
     
         8 . The cartridge holder according to  claim 1 , wherein the connector part comprises a container fastener configured to mechanically engage with a proximal end of the medicament container. 
     
     
         9 . The cartridge holder according to  claim 8 , wherein the container fastener is configured to non-detachably connect to the medicament container. 
     
     
         10 . The cartridge holder according to  claim 8 , wherein the container fastener comprises a first fastening rib and a second fastening rib on opposite sides of the cartridge receiving space, wherein the first fastening rib and the second fastening rib are configured to frictionally engage with a barrel of the medicament container. 
     
     
         11 . The cartridge holder according to  claim 10 , wherein at least one of the first fastening rib and the second fastening rib protrudes distally from a distal end face of the connector part and engages with a complementary-shaped recess of the retainer part when the connector part is connected to the retainer part. 
     
     
         12 . The cartridge holder according to  claim 1 , wherein one of the proximal end and the distal connector comprises a fastening element complementary shaped to a counter fastening element of the other one of the proximal end and the distal connector. 
     
     
         13 . The cartridge holder according to  claim 12 , wherein one of the fastening element and the counter fastening element comprises a recess and wherein the other one of the fastening element and the counter fastening element comprises a catch element configured to engage with the recess. 
     
     
         14 . The cartridge holder according to  claim 13 , wherein the catch element of one of the retainer part and the connector part extends in longitudinal direction and is configured to engage with the recess provided in the connector sidewall or retainer sidewall of the other one of the retainer part and the connector part. 
     
     
         15 . The cartridge holder according to  claim 1 , wherein the distal connector comprises a predetermined breaking structure, which is configured to break apart the distal connector when a user attempts to disengage the distal connector from the proximal end of the retainer part. 
     
     
         16 . The cartridge holder according to  claim 1 , wherein the connector part comprises a mechanical coding element to mechanically engage with a complementary shaped mechanical counter coding element of the device body. 
     
     
         17 . A cartridge assembly comprising a cartridge holder according to  claim 1  and further comprising a medicament container arranged inside the cartridge receiving space. 
     
     
         18 . An injection device for setting and injecting of a dose of a medicament, the injection device comprises:
 a device body,   a drive mechanism arranged inside the device body, wherein the drive mechanism is configured to operably engage with a medicament container containing the medicament, and   one of a cartridge holder according to  claim 1  and a cartridge assembly connectable or connected to a distal end of the device body.   
     
     
         19 . A container assembly for an injection device, the container assembly comprising:
 a medicament container comprising a barrel filled with a medicament, and   a connector part of a cartridge holder according to  claim 1 , wherein the connector part is connected or fixed to the medicament container.   
     
     
         20 . A container assembly kit comprising:
 a first container assembly according to claim  19 , the first container assembly comprising a first medicament container and a first connector part connected or fixed to the first medicament container and comprising a first proximal connector and a first distal connector,   a second container assembly according to claim  19 , the second container assembly comprising a second medicament container and a second connector part connected or fixed to the second medicament container and comprising a second proximal connector and a second distal connector,   wherein the first medicament container distinguishes from the second medicament container and wherein the first proximal connector distinguishes from the second proximal connector.